Latest cybersecurity reporting from selected sources.

Updated July 18, 2026: the two flaws now carry CVE IDs, the full mechanism has been published, a persistent-object-cache condition has surfaced, and a working proof-of-concept is public. The story below reflects all of it

A use-after-free bug in Linux's KVM hypervisor can be triggered from a guest virtual machine to corrupt the shadow-page state of the host kernel that runs it

A public proof-of-concept is now out for CVE-2026-55200, a critical flaw in libssh2 that lets a malicious or compromised SSH server trigger memory corruption on a connecting client, with possible code execution. No credentials, no user interaction. The bug affects every release up to and including 1.11.1 and carries a CVSS 4.0 score of 9.2

Threat actors have begun to exploit a recently disclosed critical security flaw impacting Cisco Unified Communications Manager (Unified CM) and Unified Communications Manager Session Management Edition (Unified CM SME)

Cisco has patched a bug in Unified Communications Manager that lets an unauthenticated attacker on the network write files to the box and, from there, climb to root

Proof-of-concept (PoC) exploit code has now been released for a recently patched security flaw in the Linux kernel that could allow for local privilege escalation (LPE)

Chaotic Eclipse, the security researcher behind the recently disclosed Windows flaws, YellowKey and GreenPlasma, has released a proof-of-concept (PoC) for a Windows privilege escalation zero-day flaw that grants attackers SYSTEM privileges on fully patched Windows systems

Palo Alto Networks has released security updates for a high-severity security flaw impacting GlobalProtect Gateway and Portal, for which it said there exists a proof-of-concept (PoC) exploit

Cisco has released updates to address a medium-severity security flaw in Identity Services Engine (ISE) and ISE Passive Identity Connector (ISE-PIC) with a public proof-of-concept (PoC) exploit

Microsoft on Thursday released out-of-band security updates to patch a critical-severity Windows Server Update Service (WSUS) vulnerability with a proof-of-concept (Poc) exploit publicly available and has come under active exploitation in the wild

A recently disclosed security flaw impacting Apache Tomcat has come under active exploitation in the wild following the release of a public proof-of-concept (PoC) a mere 30 hours after public disclosure

A proof-of-concept (PoC) exploit has been released for a now-patched security flaw impacting Windows Lightweight Directory Access Protocol (LDAP) that could trigger a denial-of-service (DoS) condition

Cybersecurity researchers have released a proof-of-concept (PoC) exploit that strings together a now-patched critical security flaw impacting Mitel MiCollab with an arbitrary file read zero-day, granting an attacker the ability to access files from susceptible instances

Malicious actors are likely leveraging publicly available proof-of-concept (PoC) exploits for recently disclosed security flaws in Progress Software WhatsUp Gold to conduct opportunistic attacks

Technical specifics and a proof-of-concept (PoC) exploit have been made available for a recently disclosed critical security flaw in Progress Software OpenEdge Authentication Gateway and AdminServer, which could be potentially exploited to bypass authentication protections

Threat actors are leveraging a recently disclosed security flaw impacting Ivanti Connect Secure, Policy Secure, and ZTA gateways to deploy a backdoor codenamed DSLog on susceptible devices

Cybersecurity researchers have developed a proof-of-concept (PoC) code that exploits a recently disclosed critical flaw in the Apache OfBiz open-source Enterprise Resource Planning (ERP) system to execute a memory-resident payload

Cybersecurity researchers have demonstrated a new technique that exploits a critical security flaw in Apache ActiveMQ to achieve arbitrary code execution in memory

Virtualization services provider VMware has alerted customers to the existence of a proof-of-concept (PoC) exploit for a recently patched security flaw in Aria Operations for Logs

Proof-of-concept (PoC) exploit code has been made available for a recently disclosed and patched critical flaw impacting VMware Aria Operations for Networks (formerly vRealize Network Insight)